In genetic engineering, a DNA segment (gene) of interest, is transferred to the host cell through a vector. Consider the following four agents (A-D) in the regard and select the correct option about which one or more of these can be used as a vector/vectors
A) A bacterium
B) Plasmid
C) Plasmodium
D) Bacteriophage
A, B and D only
A only
A and C only
A and C only
D.
A and C only
Plasmids are the extrachromosomal DNA found in bacterial cells. These are commonly used as vectors in genetic engineering programmes because these have the capacity of binding with eukaryotic DNA.
A bacteriophage is a virus that is parasitic within a bacterium. These also, are the important tools in genetic engineering as cloning vectors.
Select the correct statement from the ones given below with respect to dihybrid cross.
Tightly linked genes on the same chromosome show higher recombinations
Genes far apart on the same chromosome show very few recombinations
Genes loosely linked on the same chromosome show similar recombinations as the tightly linked ones.
Genes loosely linked on the same chromosome show similar recombinations as the tightly linked ones.
Which one of the following statements about the particular entity is true?
Centromere is found in animal cell which produces ester during cell divison
the gene for producing insulin is present in every body cell
Nucleosome is formed of nucleotides
Nucleosome is formed of nucleotides
The fruit fly, Drosophila melanogaster was found to be very suitable for experimental verification of chromosomal theory of inheritance by Morgan and his colleagues because
It reproduces parthenogenetically
a single mating produces two young files
smaller female is easily recognisable from larger male
smaller female is easily recognisable from larger male
Which one of the following symbols and its representation, used in human pedigree analysis is correct?
